<?php
/*
 * MiniMe - a minimalistic OStatus complient microblogging tool
 * Copyright (C) 2010, Tuomas Koski - koski.tuomas@gmail.com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @author     Tuomas Koski <koski.tuomas@gmail.com>
 * @copyright  Tuomas Koski
 * @license    http://www.gnu.org/licenses/lgpl.txt
 */
class Magic_Signature_KeyGenerator {
    
    private $publicKey;
    private $privateKey;
    
    public function generatePublicKeyPrivateKey() {
        $rsa = new Crypt_RSA();
        
        $keypair = $rsa->createKey();

        $rsa->loadKey($keypair['privatekey']);

        $this->privateKey = new Crypt_RSA();
        $this->privateKey->loadKey($keypair['privatekey']);

        $this->publicKey = new Crypt_RSA();
        $this->publicKey->loadKey($keypair['publickey']);
    }
    
    public function privateKeyAsString() {
        $mod = Magic::base64_url_encode($this->publicKey->modulus->toBytes());
        $exp = Magic::base64_url_encode($this->publicKey->exponent->toBytes());
        $private_exp = '.' . Magic::base64_url_encode($this->privateKey->exponent->toBytes());
        return 'RSA.' . $mod . '.' . $exp . $private_exp; 
    }
    
    public function publicKeyAsString() {
        $mod = Magic::base64_url_encode($this->publicKey->modulus->toBytes());
        $exp = Magic::base64_url_encode($this->publicKey->exponent->toBytes());
        return 'RSA.' . $mod . '.' . $exp; 
    }
}